If you're using FL Studio to create your tracks, just follow the directions below to export them as 320 kbps MP3 files.

First, click File in the top left corner, then open the export menu. The export menu will appear in a new window. When that happens, select MP3. A toggle bar will appear next to words "MP3 bitate." Be sure that toggle is moved all the way to right, selecting 320 kbps.

When that's all set, just click "Start" at the bottom of the export menu, which will begin rendering your MP3 file. Once you do that, you'll have a 320 kbps MP3 that's ready to upload to Digital DJ Pool :)